This study evaluates the current environmental influences on fish assemblages of the upper Sungai Pelus, Kuala Kangsar, Perak. Fish samplings and habitat characterizations were conducted at three significant different months, which were on dry (June 2014), wet (August 2014) and moderately wet seasons (April 2015). A total of 510 individual fish were collected from the study, which consist of four orders, nine families, 20 genus and 21 species of fishes. Cyprinidae was the biggest family, followed by Bagridae, Balitoridae and Sisoridae. Neolissochilus hexagonolepis was the only species documented under the nearly threatened list, even their individual number and occurrences were the highest recorded. The readings of environmental variables, such as water temperature, pH, conductivity, dissolved oxygen, total dissolved solids, biological oxygen demand and total suspended solids were regarded as normal for upper river area. However, the water turbidity and chemical oxygen demand (COD) were quite high, which we believed was due to seasonal variation and current anthropogenic activities of the nearby river area. Canonical correspondence analysis showed that the water conductivity, river width, COD and water velocity were the main factors in influencing the fish assemblages of this upper Sungai Pelus. The findings can be utilized as a guideline to manage, protect and conserve this upper river area in the near future.
In the last few decades, surfactants and electrolyte interaction has gained considerable attention of researchers due to their industrial and domestic applications. In this work, the effects of electrolyte (NaCl) on the critical micelle concentration (CMC) of the cationic surfactant cetyltrymethyl ammonium bromide (CTAB) at different temperatures were investigated through different techniques such as conductometry, surface tensiometer and viscosimeter. The results showed that the values of CMC of CTAB decreased with the increase in temperature as well as with the addition of NaCl. The value of CMC for pure CTAB was calculated 0.98M at 303K, which was observed to decrease as temperature increased and got value of 0.95M at 318K. Moreover the addition of electrolyte NaCl into the surfactant lead to lowering of the CMC and obtained value of 0.90M at 3M of NaCl, indicating significant electrostatic interactions between surfactant and electrolyte. Moreover the degree of ionization(α) calculated for pure cationic surfactant CTAB was 0.219, which tends to increase with the addition of electrolyte, while that of counter ion binding values (β) was observed to decrease from 0.780 to 0.201. Furthermore, the conductivity of charged micelle of surfactant and free ions of electrolyte contributed to electric conductivity of aqueous micellar solution of surfactant. The results can be helpful to develop better understanding about interaction between electrolyte and surfactant.
An optical fiber chemical sensor for the determination of free glutamate in food samples was fabricated based on the
immobilization of 0.1 M copper(II) nitrate trihydrate onto sol-gel glass powder which was then mixed with methyl cellulose
to form a pellet. A distinctive colour change from light blue to dark blue was observed in the presence of glutamate in
less than 1 min. The colour change was measured by reflectance spectrophotometer at 691 nm. A linear relationship
between the reflectance intensity and glutamate concentration was observed in the range of 12.5 to 500 mM with a limit
of detection of 10.6 mM. This method is also reproducible with a relative standard deviation of less than 5%, no effect on
pH of the glutamate solution and a good recovery of above 80%. The sensor was used for the determination of glutamate
in common food items such as soups and flavor enhancers. The results obtained from the fabricated sensor were found
to be comparable with HPLC method.
This study was carried out to determine the antioxidant activity, total phenolic content (TPC) and piperine in oleoresin
extract of pepper retting waste water. Fresh pepper berries were soaked in distilled water (1:2 w/w) and allowed to ret
at four different temperatures: 28, 35, 42 and 49°C for a total of 16 days. The retting waste water was collected on the
4th, 8th, 12th and 16th day and was then subjected to dichloromethane liquid extraction prior to analyses. The results
showed that highest (p<0.05) oleoresin yield (271.34 ± 28.09 mg/g), antioxidant activity in DPPH (84.58 ± 4.93%),
FRAP assay (49.55 ± 6.11 mM TE/g) and total phenolic content (5.64 ± 0.06 mg GAE/g) obtained at low temperature and
shorter days of retting (28°C, day 4). Whilst at high temperature with longer days of retting (49°C, day 16) resulted in
significantly higher (p<0.05) piperine content (1.81 ± 0.44%) in the waste water. Thus, the findings showed that the
agro-industrial waste water produced during white pepper processing contain valuable bioactive oleoresins and other
functional compounds which could be explored in details.
Interaction between the Red Palm Weevil (RPW) and coconuts will stimulate the plants’ early response by producing the
reactive oxygen species (ROS) which causes lipid peroxidation and membrane damage of the host plants. Thus, a multiple
defense lines, including both scavenging enzymes and molecular antioxidants have been evolved to promptly inactivate
these radicals. This study investigated the responses of catalase (CAT), peroxidase (POD), ascorbate peroxidase (APX),
α-tocopherol, ascorbic acid and carotenoids contents of three coconut cultivars which were PANDAN, MAWA and MATAG
against the RPW infestation. The infested PANDAN and MAWA exhibited higher CAT, POD and APX specific activities of 2.60
± 0.11, 5.0 ± 0.72 and 1.58 ± 0.20 units/mg protein for PANDAN whereas 1.13 ± 0.04, 39.38 ± 2.29 and 1.15 ± 0.16 units/
mg, protein for MAWA) compared with controls. However, MATAG cultivar showed no significant difference (p<0.05) in the
production of both enzymes except for POD specific activities. RPW infestations only managed to trigger the α-tocopherol
concentrations in the MAWA cultivar compared with the others. Infested MAWA and MATAG increased the ascorbic acid
concentrations, however, a contrast results was observed in infested PANDAN. All coconut cultivars exhibited higher
carotenoids content (2771.20 ± 263.90, 3043.20 ± 526.35 and 921.20 ± 281.10 µg/g.fwt of PANDAN, MAWA and MATAG,
respectively) compared with their respective controls (455.20 ± 135.10, 1408.40 ± 103.02 and 248.80 ± 110.39 µg/g.
fwt). The above results indicated that the oxidative stress induced by the RPW infestation would stimulate the activities of
enzymes and molecular antioxidants studied especially in infested MAWA. Thus, it may be suggested that MAWA cultivar
was more tolerance towards RPW infestation compared to MATAG and PANDAN. It is hoped that this finding will provide
clues on how plant respond toward stress during infestation, thus further action can be activated as soon as possible to
control the spread of R. ferrugineus.
Timber scaffold boards have been widely utilised in the offshore construction industry. However, technical specifications
and inspection procedure for the application of scaffold boards from a wood material were inadequate. In the development
of the standard requirements, evaluation of actual engineering practices could indicate the level of workplace safety. A
study was conducted to identify risk and safety measures concerning the use of timber scaffold boards in construction.
This article discusses on the occupational risks and ergonomics issues of the scaffolding application based on the physical
and mechanical conditions of tropical timber scaffold boards extracted from offshore oil and gas rigs. The boards were
exposed to a seasonal climate of East Coast monsoon of South China Sea between November and February. The scaffolding
application extended up to 20 m directly above the ocean surface and some boards were completely immersed below
the ocean surface particularly during elevated tidal waves. Some of the boards were installed as the on-deck platforms.
Forty scaffold boards fabricated from tropical timber species were evaluated. Physical characteristics of the boards
were described by natural and man-made factors. A three-point bending test was conducted to determine the maximum
load capacity of each board and the mode of fracture was evaluated. Timber identification test was conducted to identify
the groups of the timber being used. The microscopic observation confirmed the presence of hyphae which indicated the
biological deterioration has happened in some of the boards. Occupational risks were summarised based on the results
of the physical and mechanical assessments
Jerebu merupakan fenomena pencemaran udara yang memberi impak negatif kepada kesihatan dan kegiatan sosial masyarakat serta negara. Isu jerebu dibincangkan dalam al-Quran iaitu sura al-Dukhan secara menyeluruh. Kertas ini bertujuan menganalisis perbahasan berkaitan masalah jerebu yang disebutkan oleh al-Quran dan tafsiran para sarjana Islam dalam konteks dan sudut pandang Islam. Kertas ini turut membincangkan punca dan kesan berlakunya masalah jerebu daripada perspektif sains. Kajian ini menggunakan kaedah kualitatif iaitu dengan merujuk kepada kaedah transdisiplin daripada perspektif Quran dan sains. Keputusan kajian mendapati terdapat tafsiran para sarjana Islam yang mentafsirkan surah al-Dukhan dan fenomena jerebu yang berlaku pada zaman Rasullullah SAW. Ia merupakan azab dan seksaan kepada kaum Musyrikin disebabkan oleh perbuatan mereka yang enggan menerima ajaran Islam. Fenomena jerebu merupakan peringatan Allah dan pengajaran kepada umat manusia supaya sentiasa taat kepada perintah dan meninggalkan segala larangan-Nya di samping bersama-sama menjaga keharmonian dan kesejahteraan alam semesta ini. Manakala para saintis pula mendapati fenomena jerebu yang berlaku adalah berpunca daripada asap dan habuk kesan daripada aktiviti antropogen dan semula jadi serta kesannya terhadap kesihatan tubuh badan manusia yang mengakibatkan hidung berair, masalah kulit, mata terasa pedih dan berair, batuk, sakit kerongkong, kesukaran untuk bernafas dan kesakitan di bahagian dada.
This study aims to assess the effectiveness of a newly developed food safety education to improve the handwashing
practices of food handlers in school canteens. A community-based intervention study was carried out over a 2-year period.
Sixteen out of 98 primary schools were randomly selected and assigned into intervention and control groups using a
simple random sampling method. The study population included food handlers who worked in the canteens of the school
selected. The Food Safety Education Programme (FSEP) for the intervention group was developed based on the theory of
planned behaviour. The main outcome measures used were handwashing practices from the observations carried out at
baseline, 6-weeks (Post1) and 12-weeks (Post2) after the intervention. Out of 79 food handlers who participated in this
study, 33 (41.8%) were in the intervention group and 46 (58.2%) were in the control group. Prior to FSEP, handwashing
was not commonly practiced following critical events and the majority did not perform correctly. The time-effect of the
mixed design analysis of variance showed a significant increase (p=0.004) in the mean percentage of the total observed
handwashing practices from 29% at the baseline to 50.8% at Post1 (p=0.004). However, the intervention-effect of mixed
design ANOVA did not show any significant difference in the handwashing practices (p=0.210). The FSEP was effective in
improving the handwashing practices of the food handlers in the selected primary school canteens.
Natural fibre is known useful in many applications however, the existing fibre treatment method able to reduce its overall properties. In this study, a new, simple and cost-effective fibre coating treatment method was developed which was able to improve the physical and morphological properties that open a new path for natural based materials to be used in a more robust application. The physical and morphological properties of various coated kenaf fibres were analysed to comprehend the cutting behaviour of coated fibres after subjected to the pulverisation process. The kenaf fibres were individually immersed in 1:4, 1:5 and 1:6 epoxy to acetone coating solutions prior cured, and pulverised consecutively using 5 mm, 1 mm, 0.5 mm and 0.25 mm mesh sizes aperture. The morphological characteristic was analysed using polarised optical and scanning electron microscope. The result showed that 1:6 coating ratio solution able to effectively coat the fibres’ aspect ratio that forming individual coated fibre which in long length pulverised fibres. Moreover, the low viscous 1:6 solution able to penetrate inside fibre structure that supported by density and fibre crosssection analysis compare to the other solutions. In future, this analysis is crucial to give insight on the coated fibres behaviour after subjected to the mechanical means of cutting process that later relates to the reinforcing mechanism in the composite samples.
Surface topography and morphological behaviours are the important aspects in the application of surface bearing as it deals with the contact area of objects upon motion. Improved surface bearing will be set as an indicator for tribology behaviour to reduce the possibility of wear rate and reduce the friction of objects, respectively. Thus, in this study, the fundamental of micro bearing concept was imparted as the Ultra High Molecular Weight Polyethylene (UHMWPE), which is a low density filler, will float onto the surface of the composite system to become a solid lubricant upon curing. UHMWPE filler, which is commonly known for its dominant properties of high tendency to resist wear and has low coefficient of friction were fabricated alongside epoxy resin in the composite system to achieve the desired strength and durability to perform over time. However, there are limitations of UHMWPE during processing upon the dispersion of the fillers with the matrix particles due to epoxy resin that has relatively high in viscosity. Therefore, acetone has been selected as a diluent with ratio of 1:1/4, 1:1/3, 1:1/2, 1:1 to dilute the high viscosity epoxy resin. The surface profile measurement were examined using Alicona Infinite Focus and Polarised Optical Microscope. Based on the results observed, EpUPE3 (epoxy and UHMWPE with acetone ratio of 1:1/2) showed better surface distribution and morphology with relatively low value of surface roughness (Ra) which is 1.41 μm and low pseuodocolour value of surface height which is around 6.76-6.77 cm compared to other formulation ratio. In near future, these surface topography and morphological analysis are important to relate with tribological, physical and mechanical properties of the micro bearing layers for bearing applications, specifically.
Known for its plain and dry content, tajweed learning is often tedious, particularly for children. Our preliminary study confirmed that most of the learners were uninterested to learn tajweed and this fact was agreed by their educators. Currently, technological advancement helps learning enormously and it has been widely utilised, especially for the digital native generation. Therefore, we highlighted the use of augmented reality and gamification as an attempt to attract children to learn tajweed. Based on experience and motivational theory, tajweed augmented reality-based gamification learning model (TARGaLM) was implemented in the tajweed learning. To investigate the effectiveness of the proposed approach in terms of their emotional engagement (enjoyment) potential and learning performance, 198 children constituted four groups participated in the learning activities. TARGaLM successfully gained positive results of autonomy, challenge, points, badges, leader board, progression, immersion, and feedback, which are crucial for enjoyment. In the post-activity interviews, the students mentioned that the proposed approach was interesting. Furthermore, the proposed approach group indicated the highest decrease in articulation errors from the post-test compared to other groups. The use of current technology and approach not only has potential in bringing enjoyment, but also gives a positive impact on the learning outcomes.
Torrefaction is a thermal process to convert biomass into a coal-like material, which has better fuel characteristics than the original biomass. Torrefied biomass has more energy density and hydrophobic which is superior quality for handling and storage. The objective of this research was to develop a simulation model of the torrefied pelletization process from empty fruit bunch (EFB). The process was simulated using ASPEN Plus. Optimization involved a selection of the model option that produced the maximum mass yield and minimum energy requirement, with a converged base case simulation as a starting point. Torrefied biomass pellet offered coal-like properties such as high heating value, brittle, high bulk energy density and more hydrophobic. These properties could potentially avoid costly power plant modifications. On the other hand, Malaysia has issued National Biomass Strategy 2020 with target to solve the problem of under-utilized biomass in this country. Base model was based on previous study. For optimization of mass yield and overall energy consumption, six model options of design configurations were analysed. Design model 0 was used as the base model. For design model 1, flue gas from combustion reactor was channelled to torrefaction reactor. For design model 2, flue gas from combustion reactor was split to dryer and torrefaction reactor. For design model 3, combustion reactor was removed. For design model 4, flue gas was channelled to dryer reactor without combustion reactor. For design model 5, flue gas separator after dryer was removed. Out of five options, results were tabulated for the optimum one. The results showed that the highest mass yield was achieved by simulation Model 5 at 90.76 % and lowest energy requirement was achieved by simulation Model 4 at 411.336 kW. Optimization result meanwhile had shown that Model 4 was selected because it gave the maximum profitability of RM 72834.45 by considering the yield and the energy consumption simultaneously.
The assessment of exclusive breastfeeding is important to invest the efforts to promote and support breastfeeding practices. Hence this study was carried out to compare breastfeeding practices among mothers using deuterium dose to mother technique with maternal recall breastfeeding practice. A total of 30 mother-infant pairs from a university hospital and government health clinics in Klang Valley participated and completed the study. Mother-infant pairs were recruited into the study when infants were aged 3 months ± 1 week. Anthropometric measurements (height, weight, waist circumference for mother; length and weight for infant) were carried out. Socio-demographic questionnaire was self-administered while breastfeeding practices were interview administered using maternal recall breastfeeding practice questionnaire (MRBF). This was followed by baseline saliva collection of mother-infant pairs before dose and 6 days after mothers were given 30 ± 0.01 g of D2 O. The post dose saliva sample of mother-infant pairs were collected 6 times at day 1,2,3,4,13 and 14.The results showed that majority of mothers (57%) were university graduates but majority were stay at home mothers. Meanwhile, mothers had BMI with mean 25 ± 4 kg/m2 . The results from MRBF questionnaire showed that all mothers were practicing exclusive breastfeeding and their infant never received any water sources other than their breast milk. However, the deuterium dose to mother technique revealed only 3% of mothers were actually practicing exclusive breastfeeding. From the isotopic data, the calculated mean intake of milk was 721 ± 243 g/day while the mean non-milk oral intake of 122 ± 22 g/ day. In contrast exclusive breastfeeding infants received only 10 g/day non milk oral intake, demonstrating exclusive breastfeeding practice of mothers. There were different breastfeeding practice reported from mother using deuterium oxide dose to mother technique with maternal recall breastfeeding practice.
Wood is one of the most common material found in homes and industrial fires, particularly in Malaysia. The abundance of different types of wood used to build structures, frames, furniture and others are important to take note as wood is a conducive material that can be used to initiate and propagate a fire, particularly in forensic fire cases. This study was conducted to provide the volatile chemical fingerprint of burnt Merbau (Intsia sp.) wood using gas chromatographymass spectrometry (GC-MS). The wood samples were prepared under two conditions; fully dried and partially dried. Six study replications of each condition were burnt outdoors and underwent an extraction process using activated carbon tablets. The tablets were incubated in an oven for 16 hours at 80ºC. Next, the tablets were desorbed in two different types of solvent; pentane and ethanol. The pentane- and ethanol-desorbed volatile products were then introduced into the GC-MS. Volatile organic compounds obtained across both conditions were in the range of volatile acids, aromatics and its derivatives, D-glucopyranose, phenolic derivatives and cycloalkane. The compounds emitted by fully and partially dried Merbau wood samples were similar, differing only in the absence of malonic acid and succinic acid in partially dried Merbau wood samples. Both solvents desorbed different types of volatile compounds. The burning behaviour of partially dried Merbau wood were different to those documented from fully dried Merbau wood and is attributed to the composition of wood rather than the dry or wet conditions.
Fibres are important trace evidence that can be found during the course of crime scene investigation. The identification and analysis of these fibres shed light as to the circumstances surrounding a particular crime. Identifying the factors that affect the transference of fibres under various environments are crucial in providing robust conclusions of a case per se, as highlighted in this work. Donor garments were made up of four different types of fibre; 100% cotton, 100% nylon, 100% polyester and 100% wool, that were used to observe the differences in the number of transferred fibres to the recipient garment (100% cotton) and vice versa with increasing contact times of 30, 60, 180, and 300 seconds respectively. To simulate contact between the donor garment worn by a suspect and the recipient garment worn by a victim in real-life situations, the donor garment was placed on top of the recipient garment which was laid on a piece of plywood. The numbers of transferred fibres, both from the donor to the recipient garment and from the recipient to the donor garment were observed and tested using microscopic examination, burning test, solubility test and dye extractability test. Results indicated that different types of garments transferred different number of fibres with increasing contact times, and the identification of the fibres are possible via the different tests applied in this work.
Introduction: Different solvents extraction was used to extract the good fatty acid composition of Dabai fruits. Nev- ertheless, solvents extraction may exhibit harmful effects. The present study was aimed to evaluate the safety of using supercritical carbon dioxide extraction (SCO2) of dabai pulp oil by acute toxicity study in Specific Pathogen Free (SPF) Sprague-Dawley (SD) rats. Methods: The CO pulp oil extract was prepared by SCO2 extraction of the freeze- dried pulp and was administered orally to SPF SD rats (consisted of 5 rats/sex/group) at upper limit dose 5000 mg/kg body weight (BW) for 14 days. The study includes the control and treatment groups, each consisting of 5 male and female rats. The rats were fed and allowed to drink sterilized water ad libitum. Fatty acid composition (FAC) of the extract was determined using GC-FID. Electrolytes and biochemical parameters in blood, as well as relative organs weight were measured. Results: The extract at a single dose of 5000 mg/kg did not cause any acute toxicity effects or mortality to the treatment of rats during observation periods in 14 days. FAC of the SCO2 extracted oil exhibited high content of palmitic and linoleic acids. The relative organs weights (ROW) and histopathology of rats were within normal range. Conclusion: Thus, the LD50 was estimated to be more than 5000 mg/kg of CO pulp oil extract and can be considered for further investigation for its therapeutic efficacy in a larger animal model.
Introduction: There is a significant increase in the number of divorce cases among Malay Muslim couples over the past years which serves as a strong signal for the government to take initiatives to understand the current situation. A plethora of literature can be found on marriage satisfaction and the quality of the relationship within marriages. However, exploration on contributing factors to long lasting marriages amongst the Malay Muslim community are lacking. This paper aims to share the initial findings in an effort to explore of the strength of relationship in a lasting marriage amongst Malay Muslim couples in Malaysia. Methods: This paper adopted a quantitative approach utilizing the Eternal Love Instrument (c) 2016 which consisted of 171 items, distributed to 350 respondents based on simple random sampling technique. Results: The findings indicated that there are three main considerations in selecting a spouse which were (1) Religion (95.2%); (2) Character (responsible) (96.1%); well mannered (95.8%); and (3) Race (79.3%). Age, looks and type of jobs were the least considered factors amongst the respondents surveyed. The respondents perceived that the strongest element in their relationship was communication (69.6%), followed by tol- erance (62.6%) and responsible towards family wellbeing (56.4%). Conclusion: The initial survey has indicated that a lasting marriage is a consequence of having a responsible partner with good religious background. Also, from all these five constructs, these respondents considered their spouses to be highly responsible.
Overweight and obesity are a serious public health problem globally. Healthcare workers in some countries have been reported to be having a high prevalence of being overweight despite them being well informed of the aetiology and risks of excessive body weight. However, the problem of being overweight and obese among Malaysian healthcare workers is still poorly understood. The aim of this study is to assess the prevalence and factors associated with overweight and obesity among healthcare workers in Pejabat Kesihatan Daerah (PKD) Melaka Tengah.
Introduction: In Malaysia, private office workers tend to be more physically inactive due to work burden. This study aimed to determine physical activity level, motivation factors and barrier towards physical activity among private office workers. Methods: A cross sectional study using convenience sampling was conducted at nine private com- panies in Selangor involving 106 office workers aged 21 to 55 years old. Self-administered questionnaires includ- ing Global Physical Activity Questionnaire (GPAQ), Physical Activity and Leisure Motivation Scale (PALMS) and Physical Activity Barrier (PAB) were administered. Results: Over half of the respondents (58.5%) were having low physical activity level. The main motivation factors include physical condition, psychological condition and mastery. Meanwhile, tired after work, laziness, lack of discipline, family commitment and adverse weather were the main perceived barriers. A weak positive correlation was found between total motivation score and total physical activity (r=0.296; p=0.002). In contrast, there was a weak negative correlation between barriers and total physical activity (r=-0.237; p=0.015). Conclusion: The current physical activity level, its main motivation factors and barriers among private office workers were identified, providing an opportunity to create effective setting-based health promotion and intervention. It is also recommended that policy suggestions are made to influence and prepare essential partners (e.g. companies and employees) to promote ways of incorporating physical activity into one’s daily routine.
Validation of instruments is essential when assessing physical activity (PA). The aim of this study was to validate a Malay language version of the International Physical Activity Questionnaire (IPAQ-M) against Actical accelerometer and to determine its reliability and validity.
Methods A total of 90 Malay adults aged 35-65 years old participating in The Malaysian Cohort project were recruited for this study. The IPAQ-M is comprised of 12 items, covering vigorous, moderate, walking, sitting and sleeping activities, and was administered on two occasions (Day 1 and Day 9) by interviewing the participants. Participants wore the Actical accelerometer for seven consecutive days between the two interview sessions.
Results Validity tests showed that time spent in moderate-vigorous physical activity (MVPA) (min wk-1) from IPAQ-M was significantly correlated with MVPA from accelerometer (rho=0.32, p<0.01). Time spent in vigorous activity (rho=0.44) and total activity (rho=0.36) from IPAQ-M were significantly correlated (p<0.01) with that measured by accelerometer, but no correlation was observed for sedentary behaviour. Reliability tests revealed significant correlations between the two interview sessions for all intensities of PA (rho=0.55 to 0.71, p<0.01). Bland-Altman plots showed that time spent in MVPA for IPAQ-M was significantly different from that measured by accelerometer (mean difference: 98.02 min wk-1; 95% limits of agreement: - 785.33 to 1317.83 min wk-1; p<0.01). When classifying people into meeting PA recommendation, the agreement between the two instruments was fair (κ=0.22).
Conclusions The IPAQ-M has acceptable validity for MVPA, vigorous and total physical activity, and was reliable for assessing the physical activity of Malay adults.
Keywords Health care workers - Knowledge - Practice - Universal precaution - Health center.
Study name: The Malaysian Cohort (TMC) project